1、Unit 2 Cloning,Natural clone or,Man-made clone？,Dolly the sheep,A strawberry plant,Growing new plants,Twins,is one that occurs in nature.,A natural clone,is one that is produced through human intervention.,(人类介入）,A man-made clone,Dolly the sheep,She was while the others were born .,How does Dolly di
2、ffer from other sheep?,man-made clone,cloned,naturally,Skim the passage and get the main idea of each paragraph.,Para 1 Para 2 Para 3 Para 4 Para 5,The _ of cloning,The two major_ and the_ of cloning,The _of Dolly,The _of cloning in society,The _towards cloning,uses,problems,effect,procedure,definit
3、ion,attitudes,The passage tells us that animal cloning raised and scientists are not sure about its .,arguments,future,Whats the writing style? Expositive(说明性的) Argumentative（议论性的） Narrative（叙事性的） Descriptive（描写性的）,Whats the main idea of the passage?,Cloning happens both in _ and in_. They can be cl
4、oned by _ and_.,plants,animals,themselves,humans,Natural clone,Man-made clone,Para 1,The definition of cloning,1.The word “straightforward” means _. uncomplicated honest frank difficult,Para 2,The major uses and procedures of cloning,2.The cloning of Dolly the sheep succeeded because_. A. its easier
5、 to clone a sheep than other animals B. the scientists were determined and worked hard with patienceC. the scientists were rewarded and got lots of moneyD. many other attempts to clone mammalsfailed,The determination and patience of the scientists paid off. (L9),3.The lamb is the clone of the cell f
6、rom sheep B because . A. it provides the egg cell B. it gives birth to the lamb C. it provides the nucleus D. it is a female sheep,产出,有核卵细胞,无核卵细胞,体细胞,取出细胞核,用电融合细胞,代孕母羊,细胞分裂形成胚胎,How to produce a sheep （我也来当科学家）,True of false :,Four female sheep participate in the cloning of a new sheep. Electricity i
7、s needed in the procedure. Sheep B provides a somatic cell for the clone. The lamb is the exact copy of sheep A.,T,F,T,F,At first, the fact that Dolly seemed to developed _ was _. Then, came the news that Dolly became_. Altogether Dolly lived_, half the length of the life of _.,Para 3,The problems o
8、f Dolly,normally,encouraging,the original sheep,seriously ill,six and a half years,The sheep that donated the somatic cell most probably lived _years. A. 3 B. 6 C. 9 D. 13,Problems: Cloned animals may develop the_of older animals. Cloned animals may lives _ the original one.,as long as / shorter tha
9、n / longer than,illnesses,shorter than,The word “controversial” in paragraph 4 probably means_.A. complicated B. arguable C. important,Para 4,The impact of Dolly,On the other hand, Dollys appearance raised a storm of objections and had a great impact on the media and public imagination.,Translation,
10、True or false: 1 People feared that Cloned Hitlers would do harm to the world.2 All the research into human beings will be forbidden.3 Some countries to accumulate evidence of the abundant medical aid that cloning could provide.,Para 5,Peoples reaction to cloning,Many governments forbade research in
11、to human cloning.,making an exact copy,commercial,straightforward,breakthrough,plants species,animals,Dolly the sheep,complicated,objections,human beings,normally,natural,6,original,imagination,serious illnesses,media,a lamb,moral,forbade,themselves,accumulate,Cloning is a way of _ an exact copy of
12、another animal or plant. Cloning has two _ uses. Firstly, gardeners use it to produce plants. Secondly, it is _ for medical research on animals. Cloning plants is straightforward but the cloning of animals is more_. The procedure is difficult to _. In 1996, scientists succeeded in _Dolly the sheep.
13、Then came the disturbing news that Dolly was ill. _ Dolly lived for six years and a half , Dollys appearance raised a storm of _. Government became nervous and many _ research into human cloning. Scientists still _ whether cloning will help or harm us and where it is leading us.,making,major,valuabl
14、e,complicated,undertake,cloning,Altogether,objections,forbade,wonder,Summary,1. Animal clones may_ of older animals.,1. Use it to produce _ of plants,2. Animal clones may _ than the donoranimals.,3. Cloning can be valuable for_ .,3. _leaders may wantto clone themselves.,4. Religious leaders raised.,
15、4. Cloning can help save _,Fill in the chart,develop the illnesses,lived shorter,Evil,moral questions,commercial quantities,2. Cloning plants can be valuable for research on_,new plant species.,medical research on animals,endangered animals.,We can conclude _Cloning is good for us.Cloning has two as
16、pects.If cloning is used in a correct way it can bring many convenience to us.If cloning is used in an evil way it can cause much trouble.,We should use cloning in a wise way !,As a coin has two sides, everything has two aspects. On one hand, if cloning is used in a correct way it can bring many con
17、venience to us. On the other hand, if cloning is used in an evil way it can cause much trouble. Therefore, we should use cloning in a correct way.,the author does not state any personal opinion about cloning.,A. Objective (be fair) B. Negative (be against it)C. Positive (be in favor of it),The writers attitude towards cloning,Because_,Is cloning good or bad for us ? Advantages Disadvantages Group 1 and 2 Group 3 and 4,Mini-Debate,Homework,Preview language points in thetext and do Ex.(P123127 学案),
